Computer Networking
Which of the following is an important characteristic of LAN?

low cost access for low bandwidth channels
parallel transmission
unlimited expansion
None of these
application independent interfaces

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Computer Networking
What is split horizon?

It prevents regular update messages from reinstating a route that has gone down.
It holds the regular updates from broadcasting to a downed link.
Information about a route should not be sent back in the direction from which the original update came.
It splits the traffic when you have a large bus (horizon) physical network.

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Computer Networking
You save the configuration on a router with the copy running-config startup-config command and reboot the router. The router, however, comes up with a blank configuration. What can the problem be?

The newly upgraded IOS is not compatible with the hardware of the router.
You didn
The configuration register setting is incorrect.
NVRAM is corrupted.

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Computer Networking
Which of the following refers to the terms "residual error rate"?

signal to noise ratio divided by the ratio of energy per bit to noise per hertz
the probability that one or more errors will be detected when an error detection mechanism is used
The probability that one or more errors will be undetected when an error detection scheme is used
None of these
the number of bit errors per twenty four hours of continuous operation on an asynchronous line

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